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>> Police spraying water cannons at Dakota Access Pipeline protesters Sunday night in subfreezing temperatures. An estimated 400 demonstrators also met with tear gas with reports of rubber bullets being fired into the crowd. The standoff taking place 45 miles south of Bismarck on the Backwater Bridge, closed since a previous clash on October.

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Law enforcement describing Sunday's activists as aggressive attempting to start about a dozen fires to outflank and attack police barricades on the bridge. The raid is the latest in a series of increasingly violent clashes Between law enforcement and those opposing the pipeline's completion. A portion of which is said to run under a federally owned water source near the Standing Rock Sioux reservation.

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Standing Rock members and environmentalists say the pipeline would threaten water supplies and sacred Native American land. Supporters of the $3.7 billion pipeline owned by Energy Transfer Partners say the project offers the fastest route for bringing bakken shale oil from North Dakota to US Gulf Coast refineries and is safer than transporting it by road or rail.